<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport"
        content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>jQuery Callbacks</title>
</head>
<body>
  <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script>
    const callbacks = $.Callbacks()
    callbacks.add(function (data) {
      console.log('fn1', data)
    })
    callbacks.add(function (data) {
      console.log('fn2', data)
    })
    callbacks.add(function (data) {
      console.log('fn3', data)
    })
    callbacks.fire('miracle')
  </script>
</body>
</html>